The common method of extraction of metal from oxide ores is :

reduction with carbon

reduction of hydrogen

reduction with aluminum

electrolytic method

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The most common method of extraction of metal from oxide ores is reduction with carbon.

Carbon can be used to reduce a number of oxides and other compounds, because of its low cost and availability of coke this method is used widely. The only disadvantage is that it needed a high temperature which is expensive and for this, it necessitates of a blast furnace.

Hence, the correct option is (A).

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